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Analysis of the interaction between two nitrosourea compounds and X-irradiation in rat brain tumour cells

Abstract

Experimental measurements have shown that both BCNU (1,3-bis(2-chloroethyl)-1-nitrosourea) and CCNU (1-(2-choroethyl)-3-cyclohexyl-1-nitrosourea) are toxic in rat 9L brain tumour cells and also sensitize these cells to the action of ionizing radiation. The interaction of BCNU and CCNU with radiation has been interpreted using a recently developed extension of the molecular theory of cell survival. The experimental results are shown to be compatible with the mathematical equations predicted by the model and the analysis indicates that the sensitizing effect is caused by a synergistic interaction between sublethal damage caused by the nitrosourea compound and the radiation at the molecular level. The analysis of the dependence of the interaction on the time between nitrosourea treatment and radiation indicates that the optimal interaction occurs with a 5 hour interval.
Authors:
Leenhouts, H P; Chadwick, K H; [1]  Deen, D F [2] 
  1. Association Euratom-ITAL, Wageningen (Netherlands)
  2. California Univ., San Francisco (USA). Dept. of Neurology
Publication Date:
Feb 01, 1980
Product Type:
Journal Article
Reference Number:
AIX-11-537979; EDB-80-098696
Resource Relation:
Journal Name: Int. J. Radiat. Biol.; (United Kingdom); Journal Volume: 37:2
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; 62 RADIOLOGY AND NUCLEAR MEDICINE; NITROSO COMPOUNDS; RADIOSENSITIZERS; BIOLOGICAL PATHWAYS; CHEMICAL RADIATION EFFECTS; DNA; DOSE-RESPONSE RELATIONSHIPS; IN VITRO; MATHEMATICAL MODELS; ORGANIC CHLORINE COMPOUNDS; QUANTITY RATIO; STRAND BREAKS; SURVIVAL CURVES; SYNERGISM; TIME DEPENDENCE; TOXICITY; TUMOR CELLS; UREA; X RADIATION; AMIDES; ANIMAL CELLS; CARBONIC ACID DERIVATIVES; CHEMISTRY; DRUGS; ELECTROMAGNETIC RADIATION; IONIZING RADIATIONS; NUCLEIC ACIDS; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; RADIATION CHEMISTRY; RADIATION EFFECTS; RADIATIONS; RESPONSE MODIFYING FACTORS; 560301* - Chemicals Metabolism & Toxicology- Cells- (-1987); 560121 - Radiation Effects on Cells- External Source- (-1987); 550603 - Medicine- External Radiation in Therapy- (1980-)
OSTI ID:
5210068
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: IJRBA
Submitting Site:
INIS
Size:
Pages: 169-181
Announcement Date:
Jul 01, 1980

Citation Formats

Leenhouts, H P, Chadwick, K H, and Deen, D F. Analysis of the interaction between two nitrosourea compounds and X-irradiation in rat brain tumour cells. United Kingdom: N. p., 1980. Web. doi:10.1080/09553008014550211.
Leenhouts, H P, Chadwick, K H, & Deen, D F. Analysis of the interaction between two nitrosourea compounds and X-irradiation in rat brain tumour cells. United Kingdom. https://doi.org/10.1080/09553008014550211
Leenhouts, H P, Chadwick, K H, and Deen, D F. 1980. "Analysis of the interaction between two nitrosourea compounds and X-irradiation in rat brain tumour cells." United Kingdom. https://doi.org/10.1080/09553008014550211.
@misc{etde_5210068,
title = {Analysis of the interaction between two nitrosourea compounds and X-irradiation in rat brain tumour cells}
author = {Leenhouts, H P, Chadwick, K H, and Deen, D F}
abstractNote = {Experimental measurements have shown that both BCNU (1,3-bis(2-chloroethyl)-1-nitrosourea) and CCNU (1-(2-choroethyl)-3-cyclohexyl-1-nitrosourea) are toxic in rat 9L brain tumour cells and also sensitize these cells to the action of ionizing radiation. The interaction of BCNU and CCNU with radiation has been interpreted using a recently developed extension of the molecular theory of cell survival. The experimental results are shown to be compatible with the mathematical equations predicted by the model and the analysis indicates that the sensitizing effect is caused by a synergistic interaction between sublethal damage caused by the nitrosourea compound and the radiation at the molecular level. The analysis of the dependence of the interaction on the time between nitrosourea treatment and radiation indicates that the optimal interaction occurs with a 5 hour interval.}
doi = {10.1080/09553008014550211}
journal = []
volume = {37:2}
journal type = {AC}
place = {United Kingdom}
year = {1980}
month = {Feb}
}